Door closer



'. E. I... HILL noon-01.05511 Filed August 18, 1924 ,f I mvsmon f [mesf L. 1191 ATTORNEY Patented May 4, 1926.

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ERNEST L;

HILL, or JACKSONVILLE, stomps.

IJOOLR CLOSER.

app o ia sl Assess 7 1. s m 2. 10

closers, and of the type that employs a spring to effect the closing of the door.

The major objects of the invention are to design and construct it for refrigerator service primarily, althoogh it may he I wherever advantageous. The salient features of the invention include a powerful and confined coiled spring of special 7 form,

adapt ng: the marketable device to .teu it 'lght r left-hand door; a housing of form to accommodate the aboye reyer l 316- springrand a uniquesprocket device for en bling the door to main open and out contactwitli the clo er-ar of the invention, whenit is desired to re. the

refr gerator, or the like, as in a butcher shop or meat pac ing establishment.

The invention possesses other advantageous features, some of which, with the forewill he set forth at length in the following description where I shall outline in full that form of the invention which I have ectcd for illustration in the drawings accon'ipanying and forming-part of the present specification. In said drawings I have shown one form of my ini ention, but it' is to he understood that I do not limit myself to such form, since the invention, as expressed in the claim, may be embodied in a plurality of forms.

Referring to said drawings:

Figure 1. is a top View of the closer in service, and shown applied to a left-hand door. The cover of the housing has been removed to show the inclosed parts in as sen'ibly.

I is a front elevation of F 1.. Parts of the device are shown in section for clarity.

Fig. 3 is a top View of the completed article. The 'dot-and-dash lines radiating from the shaft represent the arm held out of contact with the door.

Fig. 4 is an elevation of the shaft for the closer, and Fig. 5 an elevation of the spring.

I will now describe the figures in detail: The numeral 6 indicates a door which may heuh-ingcdto the jainb 7 inv the ,usual way. 8 :1S a housing preferably of cast metal, havng a closed hottoni i) and an open top; to

the side of the housing a bracket :10 is formed adapted to receive screws 11, or the like, for securing the device to the amp. In the bracket and commnnicating with the interior of the housing,- a T-shaped slot 12 .is formed for a punposeto helatcr described.

is a coil f-spring steel and rather tightly wound at the outside coils, and is. o nl accd by strip ld; riyeted as at 15, to form a ring to constrain the springwto a si ze less than the diameter of fthe opening in the housing 8, so that the spring 1nayIbe. easi'ly set therein and in unbindinp; relation therewith. The interior coils of isspring are wound in uns ssed rslationwith respect to the spring, hutare stressed when in seryice. The terminals of the spring are formedwith hooks 16 and'lT. I-Iookltl, theyouter one,

has had a portion out away,-I ;5, for t e unobstructed passage of thestliip .141. This hook is adapted to engage the "ll-slot 12, I l, for anchorageto thestationary mem ber of the closer. The other hook 17, the incr one, engages aslot 18 in the rotatable shaft 19.

20 is the cover for the housing 8, and is secured thereto by any suitable means, such as mac iine screws 21. The cover has boss 22 for centrally supporting a sprocket hushing and which bushing; has a central opening for the reception and support of the shaft 19. The shaft is here shown hexagon in pe, and the bushing-opening registers therewith. The lower part of the shaft is cylindrical, and registers with its hearing" 24- in the. hottonr 9 of the housing 8, Fig. 2. The boss 22 forms the upper hearing for the sprocket hashing and shaft.

Around the shaft and in the center of the coil is a cylindrical bushing 25, having a registering slot :6 for the spring-hook 17, to enable the spring in operation to be wound around a cylinder rather than the comparative small diameter of the hexagon shaft with its sharp edges.

The arm 27 for closing the door is a com-- mon one employed in devices of this character, but I prefer to make the same forked as at 28, Fig. 2, to carry any suitable roller 29, the latter operating on a track 30, such as light channel iron secured to the door 6 as by screws 31. The opposite end 32 of the arm is adapted to slip over the shaft 19 and be supported thereon, and also on the sprocket 23.

On the center line of the cover 20 is pivotally secured the pawl 33 by the machine screw 34 The pawl is used as a ratchet to tension the spring 13 previous to positioning the arm 27 on the shaft 19 for service against the door, and after such tensioning the pawl may be pushed out of engagement to the position shown in dot-and-dash lines, Fig. 3.

. Also the pawl is brought into service when it is desired to leave the door remain open; this may be accomplished by opening the door the desired angle, and bringingthe pawl into engagement with the corresponding tooth of the sprocket, the pawl serving as a stop to absorb the spring reaction, thus holding the arm out of active contact with the door. The teeth of the sprocket are long, and the end of the pawl so curved as to be pushed from disengagement by turning the'arm from the pawl, the following tooth pushing the pawl away.

The letters L and R on the cover signify left and right for indicating purposes in the attachment of the device to a door. The drawings throughout show a left-hand assembly; but for the opposite-hand use and assembly, simply reverse the spring 13 by engaging the hook 16 thereof to the opposite side of the T-shaped slot 12, and move the pawl 33 to the opposite or R side of the cover 20.

Having thus described the preferred form of my invention, what I claim as new and desire to secure by Letters Patent of the United States, is the following:

A door closer comprising, a cup-shaped housing having a closed bottom, abracket on said housing for securing the housing to door frame member and a slot formed in the bracket, a cover for the housing, a coil spring for the housing having its terminals formed into hooks, the outer hook having a portion cut away, a ring encircling the spring and passing through the cut-away portion for constraining the spring to a less diameter than the inside diameter of the housing, a slotted central shaft in the housone end of said shaft projecting through. the cover and the opposite end terminating within the housing, and an arm for engagement with the shaft; the outer hook of the spring adapted to engage the slot in the bracket and the innerhook the slot in the shaft, the arm adapted to turn the shaft to coil the spring, and the said device when secured to a door jamb adapted to close the door, and the said cover provided with a 

